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Finding the Fourth Proportional to 221,820.19, 332,757.86 and 86,866.83

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Solution

The fourth proportional to 221,820.19, 332,757.86 and 86,866.83 is: 130,311.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,820.19 : 332,757.86 = 86,866.83 : x
  2. Step 2: Convert to fraction form
    221,820.19/332,757.86 = 86,866.83/x
  3. Step 3: Cross multiply
    221,820.19x = 332,757.86 × 86,866.83
  4. Step 4: Simplify right side
    221,820.19x = 28,905,620,021.45
  5. Step 5: Solve for x
    x = 28,905,620,021.45/221,820.19
  6. Step 6: Final answer
    x = 130,311.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.